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1.2Preservation and repair of archaeological, historical, and cultural sites and artefacts:

‘the artworks in the collection need indexing and conservation’

‘The availability of grants in contributing towards the repairs and conservation of historic buildings has been very significant.’

‘With projects ranging from country houses in Ireland to the Great Wall of China, the World Monuments Fund has been a pioneer in the conservation of historic sites since its foundations in New York forty years ago.’

‘The National Trust also involves volunteers in the physical conservation of sites and monuments.’

‘In the last 10 years, over 30 posts for archaeological conservation in museums and other public bodies have been lost.’

‘Collections care will be vastly improved and the plans include a conservation suite on site that will provide faster and safer repair and conservation for heritage items.’

‘Yet conservation of this heritage is a century behind terrestrial archaeology, and as public fascination with it increases, so do the threats.’

‘Ironically among the largest grants made was for archaeology, museum conservation and the teaching of ancient Mesopotamian languages.’

‘Is this trend merely due to cultural conservation, or is it also bound up with the particular development of German society?’

2Physics The principle by which the total value of a physical quantity or parameter (such as energy, mass, linear or angular momentum) remains constant in a system which is not subject to external influence.

‘An easy experiment is to reduce the cross section of a pipe in one region, making a so-called diffuser that produces large local flow velocities due to mass flux conservation.’

‘Because of conservation of angular momentum, the globes will resist any change in their orientation.’

‘In the nineteen twenties various experiments revealed what appeared to be a violation of the principle of energy conservation at the atomic level.’

‘Early models of the atom treated the atom as a solar system and used the idea of angular momentum conservation to explain its stability.’

‘This is typical of a tunneling transition, which is forbidden by energy conservation in classical physics and hence has no expansion around a classical limit.’

Origin

Late Middle English: from Latin conservatio(n-), from the verb conservare (see conserve).